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                        <li class="item item-module toggle-manual toggle-manual-show" data-longname="module:ol/extent"
                            data-name="ol/extent">
                            <span class="title toggle">
                                <span class="fa fa-plus me-2 mt-1"></span>
                                <span><a href="module-ol_extent.html">ol​/extent</a></span>
                            </span>
                            <div class="member-list" data-type="typedefs">
                                <span class="subtitle">Typedefs</span>
                                <ul>
                                    <li data-name="corner"><a href="module-ol_extent.html#~Corner">Corner</a>
                                    <li data-name="extent"><a href="module-ol_extent.html#~Extent">Extent</a>
                                </ul>
                            </div>
                            <div class="member-list" data-type="methods">
                                <span class="subtitle">Methods</span>
                                <ul>
                                    <li data-name="applytransform"><a
                                            href="module-ol_extent.html#.applyTransform">applyTransform</a>
                                    <li data-name="boundingextent"><a
                                            href="module-ol_extent.html#.boundingExtent">boundingExtent</a>
                                    <li data-name="buffer"><a href="module-ol_extent.html#.buffer">buffer</a>
                                    <li data-name="containscoordinate"><a
                                            href="module-ol_extent.html#.containsCoordinate">containsCoordinate</a>
                                    <li data-name="containsextent"><a
                                            href="module-ol_extent.html#.containsExtent">containsExtent</a>
                                    <li data-name="containsxy"><a
                                            href="module-ol_extent.html#.containsXY">containsXY</a>
                                    <li data-name="createempty"><a
                                            href="module-ol_extent.html#.createEmpty">createEmpty</a>
                                    <li data-name="equals"><a href="module-ol_extent.html#.equals">equals</a>
                                    <li data-name="extend"><a href="module-ol_extent.html#.extend">extend</a>
                                    <li data-name="getarea"><a href="module-ol_extent.html#.getArea">getArea</a>
                                    <li data-name="getbottomleft"><a
                                            href="module-ol_extent.html#.getBottomLeft">getBottomLeft</a>
                                    <li data-name="getbottomright"><a
                                            href="module-ol_extent.html#.getBottomRight">getBottomRight</a>
                                    <li data-name="getcenter"><a href="module-ol_extent.html#.getCenter">getCenter</a>
                                    <li data-name="getheight"><a href="module-ol_extent.html#.getHeight">getHeight</a>
                                    <li data-name="getintersection"><a
                                            href="module-ol_extent.html#.getIntersection">getIntersection</a>
                                    <li data-name="getsize"><a href="module-ol_extent.html#.getSize">getSize</a>
                                    <li data-name="gettopleft"><a
                                            href="module-ol_extent.html#.getTopLeft">getTopLeft</a>
                                    <li data-name="gettopright"><a
                                            href="module-ol_extent.html#.getTopRight">getTopRight</a>
                                    <li data-name="getwidth"><a href="module-ol_extent.html#.getWidth">getWidth</a>
                                    <li data-name="intersects"><a
                                            href="module-ol_extent.html#.intersects">intersects</a>
                                    <li data-name="isempty"><a href="module-ol_extent.html#.isEmpty">isEmpty</a>
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            <div class="main col-md-8 col-lg-9">
                <h1 class="page-title" data-filename="module-ol_extent.html">Module: ol/extent</h1>
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                        id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
                </div>




                <section class="content">

                    <header>
                        <h2 class="my-3">ol/extent
                        </h2>
                        <br>



                        <pre class="prettyprint source"><code>import * as olExtent from 'ol/extent';</code></pre>


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                    <article>
                        <div class="container-overview">






                            <dl class="details">





















                            </dl>




                        </div>


















                        <h3 class="subsection-title">Functions</h3>

                        <dl>


                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".applyTransform">
                                    </div>
                                    <h4 class="name">
                                        applyTransform<span class="signature">(extent, transformFn, <span
                                                class="optional">dest</span>, <span
                                                class="optional">stops</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_extent.html#~Extent">Extent</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L810">line
                                            810</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {applyTransform} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>将转换函数应用于范围。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>transformFn</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_proj.html#~TransformFunction">TransformFunction</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>转换函数。它接受一个四元组 <code>[minX, minY, maxX, maxY]</code>，表示一个范围的坐标。 </p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>dest</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>目标范围。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>stops</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>每侧使用的停止点数用于转换。默认情况下仅使用角点。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Extent.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".boundingExtent">
                                    </div>
                                    <h4 class="name">
                                        boundingExtent<span class="signature">(coordinates)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_extent.html#~Extent">Extent</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L24">line
                                            24</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {boundingExtent} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>构建一个包含所有给定坐标的范围。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>coordinates</code></td>



                                            <td class="type">


                                                <span class="param-type">Array&lt;<a
                                                        href="module-ol_coordinate.html#~Coordinate">Coordinate</a>></span>




                                            </td>



                                            <td class="description last">

                                                <p>Coordinates.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Bounding extent.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".buffer">
                                    </div>
                                    <h4 class="name">
                                        buffer<span class="signature">(extent, value, <span
                                                class="optional">dest</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_extent.html#~Extent">Extent</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L55">line
                                            55</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {buffer} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>返回增加了提供的值的范围。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>value</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>




                                            </td>



                                            <td class="description last">

                                                <p>应该缓冲的范围的数量。</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>dest</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Extent.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".containsCoordinate">
                                    </div>
                                    <h4 class="name">
                                        containsCoordinate<span class="signature">(extent, coordinate)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L122">line
                                            122</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {containsCoordinate} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>检查传递的坐标是否包含在范围中或位于范围的边缘。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>coordinate</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_coordinate.html#~Coordinate">Coordinate</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Coordinate.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                坐标包含在范围中。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".containsExtent">
                                    </div>
                                    <h4 class="name">
                                        containsExtent<span class="signature">(extent1, extent2)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L138">line
                                            138</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {containsExtent} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>检查一个范围是否包含另一个范围。</p>
                                    <p>如果一个范围完全位于另一个范围内，包括如果它们共享一个或多个边缘，则认为该范围包含在另一个范围内。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent1</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 1.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>extent2</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 2.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                第二个范围被第一个范围包含或位于其边缘上。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".containsXY">
                                    </div>
                                    <h4 class="name">
                                        containsXY<span class="signature">(extent, x, y)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L156">line
                                            156</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {containsXY} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>检查传递的坐标是否包含在范围中或位于范围的边缘。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>x</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>




                                            </td>



                                            <td class="description last">

                                                <p>X coordinate.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>y</code></td>



                                            <td class="type">


                                                <span class="param-type">number</span>




                                            </td>



                                            <td class="description last">

                                                <p>Y coordinate.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                x、y值包含在范围中。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".createEmpty">
                                    </div>
                                    <h4 class="name">
                                        createEmpty<span class="signature">()</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_extent.html#~Extent">Extent</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L196">line
                                            196</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {createEmpty} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>创建一个空的数据块。</p>
                                </div>











                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Empty extent.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".equals">
                                    </div>
                                    <h4 class="name">
                                        equals<span class="signature">(extent1, extent2)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L286">line
                                            286</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {equals} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>确定两个范围是否相等。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent1</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 1.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>extent2</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 2.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                这两个范围是等效的。
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".extend">
                                    </div>
                                    <h4 class="name">
                                        extend<span class="signature">(extent1, extent2)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_extent.html#~Extent">Extent</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L318">line
                                            318</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {extend} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>修改范围以包含另一个范围。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent1</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>The extent to be modified.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>extent2</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>对第一个（扩展的）范围的引用。</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                A reference to the first (extended) extent.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getArea">
                                    </div>
                                    <h4 class="name">
                                        getArea<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{number}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L446">line
                                            446</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {getArea} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的大小。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Area.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getBottomLeft">
                                    </div>
                                    <h4 class="name">
                                        getBottomLeft<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_coordinate.html#~Coordinate">Coordinate</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L460">line
                                            460</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {getBottomLeft} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的左下角坐标</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Bottom left coordinate.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getBottomRight">
                                    </div>
                                    <h4 class="name">
                                        getBottomRight<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_coordinate.html#~Coordinate">Coordinate</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L470">line
                                            470</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {getBottomRight} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的右下角坐标</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Bottom right coordinate.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getCenter">
                                    </div>
                                    <h4 class="name">
                                        getCenter<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_coordinate.html#~Coordinate">Coordinate</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L480">line
                                            480</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {getCenter} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的中心坐标</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Center.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getHeight">
                                    </div>
                                    <h4 class="name">
                                        getHeight<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{number}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L581">line
                                            581</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {getHeight} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的高度</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Height.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getIntersection">
                                    </div>
                                    <h4 class="name">
                                        getIntersection<span class="signature">(extent1, extent2, <span
                                                class="optional">dest</span>)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_extent.html#~Extent">Extent</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L603">line
                                            603</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {getIntersection} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取两个范围的交点。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent1</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 1.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>extent2</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 2.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>dest</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>

                                                | undefined


                                            </td>



                                            <td class="description last">

                                                <p>Optional extent to populate with intersection.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Intersecting extent.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getSize">
                                    </div>
                                    <h4 class="name">
                                        getSize<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_size.html#~Size">Size</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L646">line
                                            646</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {getSize} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的大小（宽度，高度）。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>The extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                The extent size.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getTopLeft">
                                    </div>
                                    <h4 class="name">
                                        getTopLeft<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_coordinate.html#~Coordinate">Coordinate</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L656">line
                                            656</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {getTopLeft} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的左上角坐标。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Top left coordinate.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getTopRight">
                                    </div>
                                    <h4 class="name">
                                        getTopRight<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{<a
                                                href="module-ol_coordinate.html#~Coordinate">Coordinate</a>}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L666">line
                                            666</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre
                                    class="prettyprint source"><code>import {getTopRight} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的右上角坐标。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Top right coordinate.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".getWidth">
                                    </div>
                                    <h4 class="name">
                                        getWidth<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{number}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L676">line
                                            676</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {getWidth} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>获取范围的宽度。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Width.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".intersects">
                                    </div>
                                    <h4 class="name">
                                        intersects<span class="signature">(extent1, extent2)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L687">line
                                            687</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {intersects} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>确定一个范围是否与另一个范围相交。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent1</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent 1.</p>
                                            </td>
                                        </tr>



                                        <tr class="">

                                            <td class="name"><code>extent2</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                The two extents intersect.
                                <br />




                            </dd>




                            <dt class="">

                                <div class="nameContainer">
                                    <div class="anchor" id=".isEmpty">
                                    </div>
                                    <h4 class="name">
                                        isEmpty<span class="signature">(extent)</span><span
                                            class="fa fa-arrow-circle-right"></span><span
                                            class="type-signature returnType">{boolean}</span>



                                    </h4>

                                    <div class="tag-source">
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js">extent.js</a>,
                                        <a
                                            href="https://github.com/openlayers/openlayers/blob/v8.2.0/src/ol/extent.js#L702">line
                                            702</a>
                                    </div>

                                </div>


                            </dt>
                            <dd class="">



                                <pre class="prettyprint source"><code>import {isEmpty} from 'ol/extent';</code></pre>



                                <div class="description">
                                    <p>确定一个范围是否为空。</p>
                                </div>










                                <table class="params">
                                    <thead>
                                        <tr>

                                            <th>Name</th>


                                            <th>Type</th>

                                            <th class="last">Description</th>
                                        </tr>
                                    </thead>

                                    <tbody>


                                        <tr class="">

                                            <td class="name"><code>extent</code></td>



                                            <td class="type">


                                                <span class="param-type"><a
                                                        href="module-ol_extent.html#~Extent">Extent</a></span>




                                            </td>



                                            <td class="description last">

                                                <p>Extent.</p>
                                            </td>
                                        </tr>


                                    </tbody>
                                </table>




                                <dl class="details">





















                                </dl>















                                <h5>Returns:</h5>
                                Is empty.
                                <br />




                            </dd>

                        </dl>



                        <h3 class="subsection-title">Type Definitions</h3>

                        <dl>

                            <dt class="">
                                <div class="nameContainer">
                                    <div class="anchor" id="~Corner">
                                    </div>
                                    <h4 class="name">
                                        Corner<span class="type-signature type 'bottom-left'">{'bottom-left'}</span>
                                        <span class="type-signature type 'bottom-right'">{'bottom-right'}</span> <span
                                            class="type-signature type 'top-left'">{'top-left'}</span> <span
                                            class="type-signature type 'top-right'">{'top-right'}</span>


                                    </h4>
                                </div>

                            </dt>
                            <dd class="">

                                <div class="description">
                                    <p>范围角点。</p>
                                </div>



                                <dl class="details">





















                                </dl>



                            </dd>



                            <dt class="">
                                <div class="nameContainer">
                                    <div class="anchor" id="~Extent">
                                    </div>
                                    <h4 class="name">
                                        Extent<span
                                            class="type-signature type array.<number>">{Array.&lt;number>}</span>


                                    </h4>
                                </div>

                            </dt>
                            <dd class="">

                                <div class="description">
                                    <p>表示范围的数字数组：
                                        <code>[minx, miny, maxx, maxy]</code>.
                                    </p>
                                </div>



                                <dl class="details">





















                                </dl>



                            </dd>

                        </dl>



                    </article>

                </section>




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